public class Example3_7{
  public static void main(String args[]){
    int sum=0,i,j;
    for(i=1;i<=10;i++){
    if(i%2==0){
       continue;
      }
      sum=sum+i;
  }
  System.out.println("sum="+sum);
  for(j=2;j<=5319;j++){
    for(i=2;i<=j;i++){
      if(j%i==0)
      break;
     }
     if(i>j/2){
        System.out.println(""+j+"是素数");
      }
    } 
  }
}
